Barriers of plastic materials for civil engineering purposes; barriers of plastic materials for construction purposes; boards made of plastic materials for use in building; building boards of plastic materials; building materials of plastic material; mouldings made from plastics for use in building; plastic articles for use in building (construction); plastic articles for use in civil engineering construction; plastic articles for use in construction; plastic barrier apparatus; plastic barriers (structures); plastic building boards; plastic materials for constructional purposes; plastic mouldings for building construction; plastic pipes (rigid) for water; rigid pipes of plastics (other than parts of sanitary installations; sections of reinforced plastics for use in building; building materials consisting of glass; building materials made of glass fibres; building materials of glass; glass building materials; glass for use in building; glass for use in buildings; materials of glass for use in building construction; non-metallic building elements incorporating glass; non-metallic building elements made from glass; structures made of glass